S139 Booster

S139
ManufacturerSatish Dhawan Space Centre
Country of originIndia
Used onGSLV and PSLV
General characteristics
Height20m-PSLV
20.2m-GSLV
Diameter2.8m
Propellant mass138,200 kg
138.2 metric tonnes
Empty mass30,200 kg (66,600 lb).
Launch history
StatusActive
First flightSep 20, 1993
S139
Maximum thrust4,846.9 kN (1,089,600 lbf)
Specific impulse237 s (2.32 km/s) (sea level)
269 s (2.64 km/s) (vacuum)
Burn time110 seconds (PSLV)
100 seconds (GSLV)
PropellantHTPB

The S139 (S for Solid, 139 for weight of 139 tonnes) is a Solid Rocket Booster manufactured by the Indian Space Research Organisation at the Satish Dhawan Space Centre in the SPROB facility. The rocket motor was first developed for use in the Polar Satellite Launch Vehicle. Later it was utilised in the GSLV MKII. It uses hydroxyl-terminated polybutadiene (HTPB) as a propellant. It has a maximum thrust of 4800 kN.

Associated rockets

The S139 Booster has been used in 2 major ISRO rockets.

It is used in the PSLV as its core stage since 1993.

It is also used as a core stage in Geosynchronous Satellite Launch Vehicle MKII rocket.

It is also the part of a variant of the Unified Launch Vehicle which is under development.

References

  1. ↑ "ISRO to increase production of solid booster engines to make more powerful rockets". Tech2. 29 November 2018. Retrieved 9 August 2021.
  2. ↑ "PSLV - ISRO". www.isro.gov.in. Archived from the original on 23 March 2019. Retrieved 11 August 2021.
  3. ↑ "GSLV - ISRO". www.isro.gov.in. Archived from the original on 21 June 2019. Retrieved 11 August 2021.
  4. ↑ "ISRO Unified Launch Vehicle (ULV)". forum.nasaspaceflight.com. Retrieved 11 August 2021.